The Sanchez-Lacombe equation of state was used to model cloud-point isother
ms of two systems of polyethylene in ethylene and in one system of polyethy
lene in n-hexane. The three polyethylene samples examined were very dissimi
lar in average molar mass and polydispersity. Alternative solvent parameter
sets were considered. Polymer parameters were obtained by fitting pure pol
yethylene volumetric data using an additional volume shift coefficient. Exc
ellent agreement with the experimental cloud-point-data could be achieved f
or all three systems mentioned above. Henry's constants for ethylene in pol
yethylene were also well matched by the same parameter sets. (C) 2001 Elsev
ier Science BN. All rights reserved.